fixed logic problem

Author: Itay Melo Krämer

src/generateNginxConfig.php

@@ -7,6 +7,7 @@
 foreach ($certFiles as $cert) {
     if ($cert == '.' || $cert == '..') continue;
     if (pathinfo($cert, PATHINFO_EXTENSION) === 'crt') continue;
+    if ($cert === 'default.key') continue;
     $domain = pathinfo($cert, PATHINFO_FILENAME);
     echo PHP_EOL . "\033[32m" . "- " . $domain . "\033[0m" . PHP_EOL;
     $virtualHost = getenv('VIRTUAL_HOST') ?: throw new \Exception('env VIRTUAL_HOST is required');